Actually, I had already booked tickets to see a movie at that time, so in fact I was in a room with no lights for two hours…. but that would have happened anyway so I can claim no special effort. On the other hand, I expect that the wattage on a movie projector is pretty high, so perhaps I should sit in a corner in shame for participating in high-wattage usage during that time…?

Haha. There’s a sense in which it actually annoys me seeing a bunch of monuments switching all their lights off for the one hour out of the year when it gets them good press, because I think about all the other hours they could be switched off, or at least lit more efficiently, but nobody would notice.